22955551 has 2 divisors, whose sum is σ = 22955552. Its totient is φ = 22955550.

The previous prime is 22955549. The next prime is 22955561. The reversal of 22955551 is 15555922.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22955551 - 2¹ = 22955549 is a prime.

Together with 22955549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22955521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11477775 + 11477776.

It is an arithmetic number, because the mean of its divisors is an integer number (11477776).

Almost surely, 2^22955551 is an apocalyptic number.

22955551 is a deficient number, since it is larger than the sum of its proper divisors (1).

22955551 is an equidigital number, since it uses as much as digits as its factorization.

22955551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22500, while the sum is 34.

The square root of 22955551 is about 4791.1951536125. The cubic root of 22955551 is about 284.2033812303.

The spelling of 22955551 in words is "twenty-two million, nine hundred fifty-five thousand, five hundred fifty-one".